Presentasi Baja Pak Badar

8/17/2019 Presentasi Baja Pak Badar

1/16

7.5

4

15 15

3 3 3

= 0

- RB 12 - 15 3 + 6 + 9 +

RB = 270 + 45 + 15

RB = 330

12

RB = 27.5 Ton

Dengan cara ritter melalui pot. ! "apat "i cari #e$arn%a #atang &B

12 = 0

3 - 27.5 3 =

= '2.5

3

= 27.5 Ton

R#

pa"a #atang &B #e(er)a ga%a tari( ter*a(tor Tu $e#e$ar

T, = 1.2 0.2 27.5 + 1.6 0.' 27.5

= 6.6 + 35.2

= 41.' Ton

pa"a $%arat (elang$ingan #atang tari(

Σ c

Σ D

BD

BD BD

BD

&B


2/16

λ = / = 300 = 141.5 < 240

r min 2.12

(on"i$i lele

= φ *%

= 0.9 240 2 940

= 40.61 Ton

(on"i$i *a(tur

= 2 940 - 7 21 = 1733

&m#il , = 0.'5

= φ *%

= 0.75 370 0.'5 1733

= 40.'' Ton

)a"i = 40.'' Ton > 40.61 Ton mantap pak bad

φ Tu &g

&g mm2

φ Tu &g

φ Tu


3/16

15

15

3

7.5 6 + 15 4 = 0

0


4/16

r!!


5/16

' Ton

3.5 m

13 Ton 13 Ton

2.5 m 2.5 m 2.5 m

= 0

- RB 10 - 15 2.5 + 5 + 7.5 +

RB = 225 + 40 + 15

RB = 2'0

10

RB = 2' Ton

Dengan cara ritter melalui pot. ! "apat "i cari #e$arn%a #atang &B

10 = 0

2.5 - 2' 2.5 =

= 70

2.5

= 2' Ton

R#

pa"a #atang &B #e(er)a ga%a tari( ter*a(tor Tu $e#e$ar

T, = 1.2 0.2 2' + 1.6 0.' 2'

= 6.72 + 35.'4

= 42.56 Ton

pa"a $%arat (elang$ingan #atang tari(

Σ c

Σ D

BD

BD BD

BD

&B


6/16

λ = / = 300 = 141.5 < 240

r min 2.12

(on"i$i lele

= φ *%

= 0.9 240 2 940

= 40.61 Ton

(on"i$i *a(tur

= 2 940 - 7 21 = 1733

&m#il , = 0.'5

= φ *%

= 0.75 370 0.'5 1733

= 40.'' Ton

)a"i = 40.'' Ton > 40.61 Ton

φ Tu &g

&g mm2

φ Tu &g

φ Tu


7/16

13 Ton

13 Ton

2.5 m

' 5 + 15 3.5 = 0

0


8/16


9/16

CONTOH SOAL

e#ua Batang Tari( Dengan rol i(u 60 6 Tunggal "engan utu B 41 i(a Bau

itung taan tari( rencana "ari #atang ter$e#ut

a%a Tari( = 2665.39

/e#ar rol #8 = 60 mm

Te#al rol t8 = 6 mm

Tinggi Total rol g8 = 114 mm

rmin = 11.7 mm

/ua$&g8 = 691 mm

an)ang #atang /8 = 10'7.30167 mm2

% = 250 pa

*u = 410 pa

: = 200000 pa

Diameter #aut = 12.7 mm

lang(a pertiungan

a. menentukan faktor kelangsingan

λ = ≤ 300

r min

λ = 10'7.3 = 92.931' < 300

11.7

b. menghitung besarnya nilai Nu :

- n = &g %

= 691 250

= 172750

u = ϕ n

= 0.9 172750

= 155475

n = &e u

n = &n , u

&n = n t

&n = 114 - 12.7 +

= 595.'00

, = 1 - (arena

/ =

, = 0.9

n = 595.'00 0.9

n = 219'50

u = ϕ n

u = 0.75 219'50.2

u = 164'''

Diguna(an nilai u = 164''7.65

c. cek kekuatan

/.; <

mm

2


10/16

u ≤ ϕ n

2665.39 ≤ 164''' → $%arat (e(uatan terpenui

d. cek terhadap luas bersih

/ua$ netto ≥ '5 lua$ prol

114 - 12.7 + 2 te#al >

595.' >

595.' >

e#ua #atang tari( #erupa pelat 2 158 cm "i$am#ung(an (e pelat #eru(uran 2

la$ meman)ang $epan)ang 20 cm pa"a (e"ua $i$in%a!

*% = 2400 (g>cm2

*u = 4000 (g>cm2


11/16

#erapa #e#an rencana u %ang "apat "ipi(ul #e#an tari( ?

(arena (e"ua pelat %ang "i $am#ung ter#uat "ari #aan %ang $ama! ma(a #e#an r

ole (uat tari( plat %ang le#i (ecil lua$ penampangn%a! %aitu plat 215

(riteria "e$ain u ≤

(e(uatan platn n "itentu(an "ari (on"i$i #ata$ lele "an *ra(tur

a. plat lele

u = = 0.9 *% &g

= 0.9 2400 (g>m2

= 64.' ton

#. plat *ra(tur

u = = 0.75 *u &e

"imana

& = &g = 2 15

= 30 cm2

/>@ = 20

15

= 1.33

)a"i , "iam#il = 0.75

&e = & , 0.75

= 30 0.75

= 22.5 cm2

u = 0.75 4000 22.5

= 67.5 ton

Dari (e"ua nilai (uat rencana! u %ang menentu(an a"ala nilai %ang le#i (ecil

ga%a %ang "ipi(ul #atang tari( $epan)ang 10 meter a"ala

#e#an mati " = 50 ton

#e#an iu"up i = 40 ton

rencana(an penampang #atang tari( %ang ter#uat "ari penampang "engan

*% = 2400 (g>cm2

*u = 4000 (g>cm2

"engan (om#ina$i #e#an

1.4 "

1.2 " + 1.6 l

&@&B

mengitung #e#an

#e#an rencana u

u1 = 1.4 "

= 1.4 50

= 70 ton

u2 = 1.2 " + 1.6 l

= 1.2 50 + 1.6 40

φ n

φ n

φ n


12/16

= 124 ton

u2 menentu(an

mengitung &g minimum

;on"i$i lele

u ≤

&g min = 124 = 57.41 cm2

0.9 24000 ton>m2

;on"i$i *ra(tur

u ≤ =

&n ≥ 124

0.75 400 100 0.9

&n ≥ 45.9259 cm2

φ Fy Ag

φ Fy Ae φ Fu An U


13/16

t %ang "iguna(an #er"iameter 12.7

o(

2 6

era"a pa"a titi( #erat prol ma(a "iam#il

0.9 $%arat minimum 8

410


14/16

'5 691

5'7.4

5'7.4→ $%arat lua$ terpenui

308 cm "engan


15/16

ncana a(an "itentu(an

2 15 cm2

cm2

A 67.5 ton


16/16

Presentasi Baja Pak Badar

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